Fresh water is in short supply in the Yugoslav coastal area and especially so on the islands. The use of fresh water for regional water supply systems is comparatively expensive and it is used for purposes which do not demand high quality water. An analysis of the water consumption in tourist areas suggests that the peak consumption could be lowered by 23 to 37,5 percent, thus saving about 32,2 percent of the total annual water mass. This equals about 70 percent of the total one-day flow of the Yugoslav rivers into the Adriatic.
Recycled water can be used for agricultural purposes and for aquaculture, which makes it possible to use the nutrients from waste water and to lower the quantity of waste matter in the coastal sea.